CVE-2025-49796 Libxml: type confusion leads to denial of service (dos)
An attacker can cause a denial of service by crafting malicious XML input that triggers memory corruption in the libxml2 library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-49796?
CVE-2025-49796 is a critical memory corruption vulnerability in Red Hat OpenShift File Integrity Operator - FIO 1, published on 16 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory.
Weakness: CWE-125
Which versions are affected by CVE-2025-49796?
How do I fix CVE-2025-49796?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-49796 being exploited?
There is no known exploitation of CVE-2025-49796 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2025-49796, AZL-64092, AZL-64130, BELL-CVE-2025-49796, DEBIAN-CVE-2025-49796, ECHO-2f9b-2b25-b4f7 and 2 more.